Data recovery is all about salvaging data from formatted, damaged, failed, wrecked or inaccessible storage media. Data loss occurs due to various reasons and data recovery salvages data from media such as hard disk drives, digital cards, tape drives, pen drives, CDs, DVDs, RAID etc.
Data Recovery involves setting right the physical damage caused to the storage device or logical damage caused by the operating system. Further, data recovery plays a very important role in forensics, helping investigators unravel crimes.
Data Recovery has a fairly high rate of success and though the reasons for data loss range from power surges, static electricity, sabotage, viruses to fires, floods and formatting, experts are able to retrieve data in most cases.
Data Loss and Data Recovery
Statistics reveal that the main reason for data loss is because of hardware malfunction which makes up 44% of all data loss. User error -32%, software corruption -14%, Computer viruses - 7%, Natural Disasters -3 % are the other major reasons for data loss. Whatever be the reason, there are data recovery solutions that can retrieve data.
Professional data recovery services can recover data from different operating systems like Windows, Linux, Mac, Solaris or UNIX. The process of recovery is highly specialised and painstaking. There are times when data recovery can be fairly straight forward and just involves plugging the hard drive into an external adapter and then plugging it into another computer.
However, when the situation is complicated, the process of data recovery involves different tools and expertise to retrieve the data. It could be because the Master Boot Record or Master File Table are corrupt. In such a case there is specific software that can rewrite partitions, rebuild the Master File Table or even repair the dysfunctional Master Boot Record. While to an amateur the process can seem intimidating, trained professionals can carry out the process in an exact manner to retrieve lost data.
In the case of mission critical files, trying to use DIY software and apparent simple recovery steps can go terribly wrong. The need of the hour is to hand over the task to professionals who will use sophisticated and expensive machinery to save the data.
The Process of Data Recovery
Physical damage to a storage device almost always results in some kind of data loss. Physical damage cannot be repaired by regular users. Opening up the hard drive could cause dust to settle in and worsen the situation. In such cases it is best to hand over the damaged storage device to a professional company. These companies have Class 100 clean rooms which provide a controlled environment to recover data. The extracted image is used to reconstruct data after the resulting logical damage has been repaired.
Physical recovery procedures could involve replacing a damaged printed circuit board with a new one, changing the damaged read/write heads, removing hard disk platters and installing them into a healthy drive etc. These are technical procedures and should not be attempted by common users.
Logical damage resulting in data loss is a fairly common occurrence. Logical damage leaves a file system in an inconsistent state. Third party utilities are used to recover data in these circumstances. One of the main techniques involves scanning the logical structure of the disk and ensuring that it is consistent with specifications or installing the operating system on a separate partition from the user data.
Another technique for file system repair assumes very little about the state of the file system and instead tries to re-build it from scratch. The entire drive is scanned to provide information on the system’s DNA. Even when logical structures are completely destroyed, recovery procedures can extract data and transfer it to a different storage medium.
The High Cost of Recovery
As mentioned earlier, to ensure that data recovery is not hampered by dust and other pollutants in the environment, companies construct clean rooms. These clean rooms are equipped with all the necessary machinery for recovery while also being temperature controlled and totally dust free. These clean rooms are not expensive to construct and maintain.
The professionals who are hired to carry out data recovery are highly trained experts whose services do not come cheap. Good data recovery companies like to hire only the best to ensure service of the highest standard. Considering the expense that a data Recovery company incurs to offer good service, it is justified then that the cost to the end user too is high. However, since lost data is usually valuable, recovering it, even at a high price is well worth it.
Create By : http://www.1888articles.com
0 komentar:
Post a Comment